Work more comfortably.
The guidelines in this section can help you work more comfortably with your computer. For detailed information about ergonomics,
see Apple’s Environmental Health and Safety Web site at www.apple.com/about/ergonomics
Mouse
mPosition the mouse at the same height as your keyboard. Allow adequate space to use the mouse comfortably.
Keyboard
mWhen you use the computer keyboard, your shoulders should be relaxed. Your upper arm and forearm should form an approximate right angle, with your wrist and hand in roughly a straight line.
mYou may have to raise your chair so your forearms and hands are at the proper angle to the keyboard. If this makes it impossible to rest your feet flat on the floor, you can use a footrest with adjustable height and tilt to make up for any gap between the floor and your feet. Or you may lower the desktop to eliminate the need for a footrest. Another option is to use a desk with a keyboard tray that is lower than the regular work surface.
mUse a light touch when typing and keep your hands and fingers relaxed. Avoid rolling your thumbs under your palms.
Chair
mAn adjustable chair that provides firm, comfortable support is best. Adjust the height of the chair so your thighs are horizontal and your feet flat on the floor.
mThe back of the chair should support your lower back (lumbar region). Follow the manufacturer’s instructions for adjusting the backrest to fit your body properly.
Computer
mArrange the computer so the top of the screen is slightly below your eye level when you’re sitting at the keyboard. The best distance from your eyes to the screen is up to you, although most people seem to prefer 18 to 28 inches (45 to 70 cm).
mPosition the computer to minimize glare and reflections on the screen from overhead lights and windows.
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